Glance Images

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In the OpenStack context, an image is a file that contains a virtual disk from which you can install an operating system on a virtual machine. You create an instance in your OpenStack cloud by using one of the images available.

The VMware Integrated OpenStack image service component natively supports images that are packaged in the ISO, OVA, and VMDK formats. You can also import RAW, QCOW2, VDI, and VHD images, which are automatically converted to the VMDK format during the image creation process.

You can configure images for Windows guest customization directly in the VMware Integrated OpenStack dashboard by applying the guest customization metadata to the Glance image used to create an instance.

By default, Nova snapshots are Glance images that are stored and organized as VM templates in the vCenter Server configured for VMware Integrated OpenStack. You can modify this behavior so that snapshots are stored as stream-optimized VMDK disks instead.

By default, the Block Storage upload-to-image feature creates a Glance image from a Cinder volume that is stored and organized as a VM template. You can modify this behavior so that the images are stored as streamOptimized VMDK disks instead.